package com.qymerge.manage.core.utils;

import javax.servlet.http.HttpServletRequest;

/**
 * 自定义访问对象工具类
 *
 * 获取对象的IP地址等信息
 * @author X-rapido
 *
 */
public class CusAccessObjectUtil {

    /**
     * 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
     *
     * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
     * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
     *
     * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130,
     * 192.168.1.100
     *
     * 用户真实IP为： 192.168.1.110
     *
     * @param request
     * @return
     */
   /* public static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        MyLogger.log.debug("request.getHeader('x-forwarded-for'):" + ip);

        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
            MyLogger.log.debug("request.getHeader('Proxy-Client-IP'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
            MyLogger.log.debug("request.getHeader('WL-Proxy-Client-IP'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
            MyLogger.log.debug("request.getHeader('HTTP_CLIENT_IP'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            MyLogger.log.debug("request.getHeader('HTTP_X_FORWARDED_FOR'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
            MyLogger.log.debug("request.getRemoteAddr():" + ip);
        }
        return ip;
    }*/

    public static String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
            MyLogger.log.debug("header-->Proxy-Client-IP:" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
            MyLogger.log.debug("header-->WL-Proxy-Client-IP:'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("http_client_ip");
            MyLogger.log.debug("header-->http_client_ip:'):" + ip);
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            MyLogger.log.debug("header-->HTTP_X_FORWARDED_FOR:'):" + ip);
        }
        if (ip != null && ip.contains(",")) {// 如果是多级代理，那么取第一个ip为客户ip
            ip = ip.substring(ip.lastIndexOf(",") + 1, ip.length()).trim();
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

}
